书接上回
在xml里建立属性,然后java代码里用typedArray获得这些属性,得到属性后,利用属性做一些事.例:得到xml里的color,赋给paint.
1.在res/values/下新建attrs.xml
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
- <declare-styleable name="CustomView2">
- <attr name="textColor" format="color" />
- <attr name="textSize" format="dimension" />
- </declare-styleable>
- </resources>
format详解可参照http://blog.csdn.net/ethan_xue/article/details/7315064
2.主要看构造函数
- public class CustomView2 extends View {
-
- private Paint mPaint2;
- private String mText = "drawText";
-
- public CustomView2(Context context, AttributeSet attrs) {
- super(context, attrs);
- mPaint2 = new Paint();
-
- TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CustomView2);
-
- int textColor = a.getColor(R.styleable.CustomView2_textColor, 0xFFFFFFFF);
- float textSize = a.getDimension(R.styleable.CustomView2_textSize, 35);
- mPaint2.setColor(textColor);
- mPaint2.setTextSize(textSize);
-
- a.recycle();
- }
-
- @Override
- protected void onDraw(Canvas canvas) {
- super.onDraw(canvas);
-
- mPaint2.setStyle(Style.FILL);
- canvas.drawText(mText, 10, 60, mPaint2);
- }
-
- }
3.布局
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:test="http://schemas.android.com/apk/res/ethan.customview1"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- >
- <ethan.customview1.CustomView2
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- test:textColor="#f00"
- test:textSize="20sp"
- />
- </LinearLayout>
4.效果图
下载地址 http://download.csdn.net/detail/ethan_xue/4108832
android自定义控件(三) 自定义属性
原文：http://www.cnblogs.com/chengzhengfu/p/4574086.html
